from __future__ import annotations

import re

_CODE_BLOCK_PATTERN = re.compile(r"```[\s\S]*?```", re.DOTALL)
_TABLE_PATTERN = re.compile(r"\|[^\n]+\|", re.DOTALL)
_LARGE_OUTPUT_THRESHOLD = 1500
_URL_PATTERN = re.compile(r"https?://[^\s<>\"{}|\\^`\[\]]+")


def should_use_card(content: str, buttons: list | None = None) -> bool:
    if buttons:
        return True

    if len(content) > _LARGE_OUTPUT_THRESHOLD:
        return True

    if _CODE_BLOCK_PATTERN.search(content):
        return True

    if _TABLE_PATTERN.search(content):
        return True

    return False


def dispatch_render(content: str, *, buttons: list | None = None, render_mode: str = "auto") -> str:
    if render_mode == "card":
        return "card"
    if render_mode == "raw":
        return "text"

    if should_use_card(content, buttons):
        return "card"
    return "text"


def extract_urls(content: str, max_urls: int = 5) -> list[str]:
    urls = _URL_PATTERN.findall(content)
    seen: set[str] = set()
    result: list[str] = []
    for url in urls:
        url = url.rstrip(".,;:)!?\"'")
        if url not in seen:
            seen.add(url)
            result.append(url)
            if len(result) >= max_urls:
                break
    return result